Preheat oven to 350°F.Pour the red wine into a saucepot and bring to a boil over high heat. Boil until reduced by half, about 8 minutes. Set aside to cool. Line an 8×8-inch metal baking pan with ...

1 cup Cabernet Sauvignon; 2 tbsps butter for greasing; 1¼ cups all-purpose flour; ⅓ cup unsweetened cocoa powder; 1 tsp baking soda; ½ tsp kosher salt ...